The two boys were camping in the backyard. When they couldn't figure out what time it was, the first boy said to the second, "Start singing very loud." "How will that help?" said the second boy. "Just do it," insisted the first. Both boys broke into song, singing at the top of their lungs. Moments later, a neighbor threw open her window and shouted, "Keep it down! Don't you know it's three o'clock in the morning?" 两个男孩子在后院露营，他们不知道到了晚上几点钟。于是，一个男孩对另外一个说：“我们开始大声唱歌就行了。” “那就会知道时间吗？”第二个男孩问。 “只管唱吧。”第一个坚持道。 两个孩子开始大声唱歌，过了一会儿，一个邻居打开窗户喊道：“小声点！你们不知道现在是凌晨三点吗？”